Huge number of entries in Inbound queue( or in trfc* tables) in CRM

Hi Experts,

We have following issue:-

1. Bdocs in CRM are not processing automatically due to this no records are coming in Delta load in BW.

2.Is it right to delete TRFC* tables entries ? Will it affect CRM Application means inconsistency will come or not?

Our Analysis:-

We have done some R&D and got some information:-

1.There are huge number of entries in INBOUND QUEUE so it fails to execute SMQ2 t-code as max time out are over.

2.Then we checked TRFC tables which data details are:-

TRFCQDATA 15,798,003

TRFCQSTATE 12,063,032

TRFCQIN 160,405,099

3. We are advised to delete these entries but this affect the CRM Application.

Our Scenariao:-

We have standalone CRM System (not R/3) which is connected with BW7.0  only.

Please provide a correct solution.

Thanks & regards,

Arpit.