Null Values From Retrieved Spreadsheet Data

I have a vba macro written in an excel worksheet (WS1) that reads another excel file (WS2) and retrieves data and writes it into the worksheet with the macro (WS1). It works beauifully except for one little problem. When I send it to a co-worker the numbers part of the data returns null values. I am connecting to (WS2) using ADO connection strings for the spreadsheet and recordset. The only difference I see is that in references of WS1, it shows Microsoft ActiveX Data Objects 2.7 library, it shows 2.8 library on my machine. Also it shows recordset 2.8 library on my coworkers machine, as well as mine.