RFC_ERROR_SYSTEM_FAILURE error comes

Hi

I have written a sample rfc code to connect to the SAP system.

I am trying to connect to the system with a user which is not existing

for e.g ABCDEF

If is select the language as EN

connect_param = 'TYPE=3 TRACE=1 CLIENT=080 USER=ABCDEFG PASSWD=******** LANG=EN ASHOST=sapserver SYSNR=01'

I get the error as "RFC_ERROR_LOGON_FAILURE" which is quite correct.

B)But i i use the language as "DE"

connect_param = 'TYPE=3 TRACE=1 CLIENT=080 USER=ABCDEFG PASSWD=******** LANG=DE ASHOST=sapserver SYSNR=01'

I get the error as "RFC_ERROR_SYSTEM_FAILURE"

Any clue why this is coming

Best Regards

Manoj