In DIRE need of a Crystal Report 10 expert!!!!!!!!!!!

I can't even get a simple formula to work right. On the following code

if {tblConsignees.consignee} = {tblBatchDetail.destCustNumber} then
    {tblConsignees.AdventVendorLocationID} + "/" + {tblConsignees.AdventInvSiteID}
else
    "Unknown"

I get "A statement is expected here" error on {tblConsignees.AdventVendorLocationID}

I run into an error on every @#$% formula I try and create. Am I missing something here?

HELP IS NEEDED BADLY!!!!

Thanks,
Blake