Solution Manger Sap MMC, disp+work process says message server unreachable

Hi Folks, I have installed Solution Manager on Windows 2003, 3GB ram, 300 Gigs, installation completed success fully, after installation i worked on post-installation, like client creation, setting up solution monitoring, logon.._sap* to 0. After I have restarted the solman, in the Sap MMC says dispwork running but message server not connected, and after few moments dispwork stopped.

I think its due to memory allocation for ABAP stack, i searched for this problem, but i didnt find good solution. Any body could sugges me in working out this problem, and also may be in the profiles folder, if there's any thing which i can add parameters for abap/buffer or abap/heap size.

Hope some could try to resolve this.

Thank you.