Idoc error (Account <vendor no.> is currently blocked by user <user name>)

Hello ,

I am sending a cremas idoc from external system (XI) to R3

But the idoc doesnt get posted.

It throws the following error 51

Account <vendor no.> is currently blocked by user <user name(login id for R3)>

I tried resending this idoc using tcode we19 and was successful in testing it

However, when i try sending it through XI, it gives me the error

Does any one know how this can be solved?

Regards,

Roshani