delta refresh cache in SXI_CACHE Transactions disabled

Hi Experts!

<b>I have SAP ECC and SAP XI installed on same SAP MMC. ECC is working fine, but the Problem is with SAP XI. When SXI_CACHE transactions executed it giving the error as "Unable to refresh the cache". and the "Delta cache" is also disabled. So any can help me pls pass on the links or answers or any gud solutions I ll b thankful for them....</b>

THANKS IN ADVANCE!!!

Sunil K Shetty