Sounds to me like you have NEVER updated your DBPro as there was an old error to do with multyplying be -1
From patch 3 release notes:
Quote: "Due to a parse error, A = A * -1 with spaces caused the equation to produce the wrong result"
Suggest you quickly toddle off to download area and get update 5.1 or 5.2 While you are there, get the editor (IDE) updates as well.
You are missing loads of bug fixes and new features if never updated from V1 thats on the CD. See the 'bug' forum and sticky thread about previous releases for full details of whats been fixed
Boo!