Stored procedure problem

Running IDS 9.21UC4 on Unixware 7.11 We have a number of identically structured databases in our group - an accounts system. We want to be able to link common accounts together for reporting purposes. Each site will have 2 stored procedures: get_account - to which will be passed a company identifier, an account number,and the name of the remote server (site_name). This will be run locally. get_account_details - to which will be passed the same company identifier and the account number. This will be run remotely. get_account has the line: LET execute_string = "mach4@"||trim(site_name)||":get_account_details"; CALL execute_string(company_id,customer_acc) returning........ this in effect builds and executes the remote call (database always called mach4). Problem is: in dbaccess.... If I run 'get_account' for a given accont number and site_name I get back the results from the remote site as I expected. But if I then run it for the same acount at a different site I'm getting the SAME results as from the first site. If I exit dbaccess and run the procedure for the second site it works fine. If I run "mach4@site_name:get_account_details" directly from a local site to a remote site it works fine time after time. The problem only seems to be when one SPL is calling another? This is driving me bonkers!!!! Any tips? TIA Ian