I am reading now some texts from RAMAYANA and SRIMAD BHAGAVATAM PURANA and I have one question for you :

Is there a relation between sage Prajapati KARDAMA by RAMAYANA and KARDAMA MUNI from SRIMAD BHAGAVATAM PURANA ?(both are the same person)
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FOR KARDAMA (The Ramayan localizes the UttaraKuru in Bahlika country [Ethnic Settlements in Ancient India, p 110]. According to it, Ila, son of Prajapati Kardama, king of Bahli (Bahlika) country, gave up Bahli in favor of his son Sasabindu and founded a city of Pratisthana in Madhydesa The princes of Aila dynasty [which is also the dyanasty of Kurus], have been called Kardameya [Ramayana (Lahore Edition) Uttarakanda, 89-3-2, pp 299-300, 309, cf Ethnic Settlements in Ancient India, p 110])
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by RAMAYAN – UTTARAKANDA -
http://www.ramayan.com/nailart/

110 Ila's strange desire
Rama narrated the episode of Ila to Lakshmana. " Kardama's son Ila was the ruler of Bahlika. Once on a hunting spree he reached the territory where Kumaraswamy was born. There Siva was moving around in the guise of a woman with Parvati. Even the birds and beasts also were in the feminine guise. Ila and his entourage too turned into women. Knowing it was Siva's deed, Ila prayed to him. Siva was not pleased. So, urged Parvati. She said, " Half your boon will be granted by Siva and half by me." Ila said he wanted to be a man and a woman in alternate months. She said, "Amen," He metamorphosed into Iladevi and spent one month.

111 Budha falls for Ila
Bharata and Lakshmana were surprised by this strange tale and asked Rama to proceed. " The first month when Ila became a woman, Moon's son Budha fell in love. He learnt through courtiers that Ila ( Devi) had no husband. Budha grasped the truth and told Ila's entourage, " You will become Kimpurusha woman and eat tubers, roots and other forest produce and live. The men who come and marry you too will become Kimpurusha's

112 Ila gives birth to Budha's son
Budha spent time with Ila in the form of a woman. After a month, Ila became man again. He went to Budha bathing in the lake and asked him about his entourage. "Your entourage has killed by a hailstorm," he replied. Ila was stricken with grief. Budha told him you be here for a year and your wishes will be fulfilled. Thus, Ila made love to Budha and learned the righteous ways in alternate months as woman and man. Ila became pregnant gave birth to a son who was a replica of Budha. When the boy grew up Ila handed him over to Budha to initiate him into Brahmacharya.

113 Pururava rules Pratisthana
Budha initiated sages and told them, " Ila is the son of Lord of the people Kardama. You know about his sex change. Make him a complete man he once was." Sage Kardama suggested performing Aswamedha as the only way out. Thus Ila got back his manhood. Ila left Bahlika Kingdom and built Pratisthana and ruled from there. Sasibindu succeeded him at Pratisthanapura. He was again succeeded by Pururava. Thus, Rama narrated the significance of Aswamedha to his brothers.
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SRIMAD BHAGAVATAM by Krsna-Dwaipayana Vyasa
(Translation: A.C. Bhaktivedanta Swami Prabhupada & others)

3. The Lord then appeared as the Kapila incarnation, being the son of the prajapati brahmana Kardama and his wife, Devahuti, along with nine other women [sisters]. He spoke to His mother about self-realization, by which, in that very lifetime, she became fully cleansed of the mud of
the material modes and thereby achieved liberation, the path of Kapila.

27. Sage Kardama, husband of the great Devahuti, was manifested from the shadow of Brahma. Thus all became manifested from either the body or the mind of Brahma.

57. The father, Manu, handed over his first daughter, Akuti, to the sage Ruci, the middle daughter, Devahuti, to the sage Kardama, and the youngest, Prasuti, to Daksa. From them, all the world filled with population.