IDoc to XI (IDoc not arrive)

Hello,

i want to send an IDoc from an SAP System to the XI.

I have done this before, it was working and i couldn't see

any IDocs in 'we05' on the XI.

Now i have a new landscape, where the IDoc not arrives

in the message monitor, but is visible in 'we05' on the XI

and has segment errors as well.

Any Ideas?

Regards

Patrick