Amessage incompatiblity?

Hi,

Opnenfire works for me nearly perfect, but … i can comunicate with everyone but “amessage” (.de, .info, .at, .fr, etc.) users. When they try to contact me the get:

Error (502): Failed to deliver stanza to other server while sent out dialback request: xxxx.xxxx.xxxx.xxxx: Connected (remote connection failed)

Is this a knowen issue ?

TIA

matthias