SUS self reg

Dear expert,

I met an issue about the SUS self reg.

The system can send two email to supplier successfully. while the password sometimes wrong. I already debug into the password verify fm:BBP_SUS_BUPA_REGID_CHECK.  There is an internal program called 'INTERNET_USER_LOGON', I cannot go into this program, maybe it is SAP internal program. So I cannot get the table of saving the user name and password. And also, I donot know how to regenerate the password again manually. How to deal with it?

Thanks experts,

Regards,

Hayashi.