Proxy objects are client dependent or independent ?

Hi,

I wanted to know whether the Proxy objects are client dependent or independent ?

I have created a client proxy in a 110 client and when i am trying to trigger this proxy from other 130 client, i am getting error in data upload.

FYI, this scenario is working fine in 110.

Also,

in test class CX_SYSTEM_FAULT...

code: INTERNAL.SYSTEM_NOT_CONFIGURED_AS_XMB

errortxt: SYSTEM NOT CONFIGURED AS INTEGRATION ENGINE

Please suggest me ...