Transaction Launcher calling SAP R/3 transactions not working as expected

We are using crm 2007 sp4 and have configured the transaction launcher functionality to call specific r/3 transactions from the crm web client for our sales managers. When we currently select the configured link we get the following message:

The action box transaction ended with an errror

Reason:: Errors in container: Object element '<MAINOBJ>' is persistent

In transaction crms_ic_cross_sys we have maintained the following setting:

http://server:port/scripts/wgate/CCMP_RABOX/!

is this correct?

Everything else looks fine

Thanks in advance

Eddie