Hi Jain,
As per KBA: 1632185 - Idoc is not getting generated by RFFOEDI1 - Error B1090 , have you maintained the Partner profile for IHC bank with PAYEXT message type, with receiver port you may have already created one with Basic Type PEXR2002 and another with IDCREF01?
in the case you have not maintained any of IHC related ALE setting, try to download -W25_BB_ConfigGuide and run through ALE section for IHC, because there are a number of ALE setting (i.. Port, RFC etc)
Hope that this helps.
Taro