Issue with Arbortext and Documentum Connection

Webtop is migrated from 6.7 sp1 to webtop 6.7 sp2.Arbortext version used is 6.0 M020 in both.

In webtop 6.7 sp1,opened a xml document in Arbortext Editor.Connected to Documentum via AE and could insert components.

Whereas in 6.7 sp2,even after connecting to Documentum through AE,while hitting enter to insert a component,it is asking for the documentum connection again.

Why it is asking for the connection again,when it is already connected.What is the solution to this behaviour?