On my test PC, I can execute this:

oConn = CreateObject("ADODB.Connection")
oConn.ConnectionString = "Provider=VFPOLEDB;Data Source=d:\ADNWebService\Employe.dbf;Password='';Collating Sequence=MACHINE"
oConn.Open
oRs = oConn.Execute('Select * from Employe')

But, when moving the same code on the production server, in the last line, I get "OLE object may be corrupt". Any idea where I should look to resolve that issue?