yman

One one of my SMS 2003 Advanced Clients I am receiving the following errors
from the "Advanced Client" component. All my other Windows XP SP1 or SP2
Advanced clients work fine. I have tried ccmclean/all on this XP client to no
avail. I've also tried uninstalling/reinstalling BITS V1.5/2.0.

Message ID: 10803
The client failed to download policy. The data transfer service returned
"Error downloading data." (-2147024809).


Message ID: 10815
The SMS Service Host (CCMEXEC) encountered a failure (0x80070057) when
performing Certificate operations.
Possible cause: The ACLs on the Certificate store are incorrect.
Solution: Verify that the ACLs on the Certificate store are correct. If not,
fix the ACLs appropriately.
Possible cause: Encryption is not supported on this version of the Operating
System.
Solution: Refer to the SMS Do***entation on supported Operating Systems.
Possible cause: The Certificate Store is corrupted.
Solution: Refer to the Windows Do***entation on troubleshooting this.

Any Idea ???

Thanks