excell 2007

Hi all , runnig win xp with office 2007. in my excell program the zipcodes will and cannot me modify for mail merge. the infomation was copied and paste from microsoft works excell program. also when I mail merge the complete merge aspect comes up blank’ no lables . I have previously converted the document prior to merging. has any one succesfully transfer microsoftworks excell (copy/paste) to excell 2007?.