CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER

Hi,

I have a SSIS package that runs ok when Im running from any desktop. (It works in BIDS and SSMS)

But when I log onto the server (with the same account) -  SQL Server 2008 R2 - I get an error

SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER.  The AcquireConnection method call to the connection manager "Excel Connection Manager" failed with error code 0xC0202009

I get this on the server in BIDS, SSMS and when running from an agent job.

Any ideas what this might be?

Thanks,

Zoe