Transaction- Send-Receive

Hi,

I use a SAP send ****t with request and response operations in a 
orchestration.
Would you please tell me how I should configure transactions etc. to be
sure 
that the message has been sent without any problem and if a problem occurs
I 
would be able to resume it.
Here is my problem.
If  the send ****t fails (for ex. because of a network problem), both Send 
****t and Orchestration services go to suspended state.
I see 2 suspended service in BTSAC.
After I fix the problem (for ex. network) , If I resume the send post 
service , it works but orchestration does not continue working and stay in

suspended mode.
If I try to resume orchestration , it continues to throw same exception.

I`d like to resume the orchestration  if a request-response ****t fails but
I 
coulnd`t figure out how I can use scopes/transactions etc.

Thanks
Kenan