(-121) TDS addon seems disconnected!! Please restart TDS addon. in SAP8.8

Hi, SAP B1 Expert,

When I added of A/P invoice with TDS entry at that time below error :-

(-121) TDS addon seems disconnected!! Please restart TDS addon

I was updated 2007 B to sap 8.8.

Please help

Thanks

Ashish Nandgaonkar