Problem updating table on linked server.

Hi,

Please help me with below scenario,

I am not getting any error while update a table that is on diferent server. but when I use Begin Tran I get below mentioned error.

"OLE DB provider "SQLNCLI" for linked server "192.168.10.115" returned message "The partner transaction manager has disabled its support for remote/network transactions.". Msg 7391, Level 16, State 2, Line 2 The operation could not be performed because OLE DB provider "SQLNCLI" for linked server "192.168.11.103" was unable to begin a distributed transaction. "

My update statement is as

BEGIN TRAN
       update IB  
       set 
       IB.status = A.status
       from [192.168.11.103].Testdb.dbo.emp1 IB , emp2 A 
       where IB.eid = A.eid 
       and IB.form_no = A.form_no 

IF @@ERROR <> 0      
       BEGIN      
         ROLLBACK TRANSACTION      
         return -1      
       END
       ELSE
       BEGIN  
COMMIT TRANSACTION 
         END