Running on desktop but running differently in server machine

Hi,

i have developed SSIS package to check data, if mismatch with text file data and db data send email notifiction. Its running correctly in my desktop (connecting to production server). Existing data doesnt have any mismatch. so no email notification.

i moved this package into production server but it's sending emails for mismatch.  So my question same package with same server running differently on my desktop and server machine.

In the package the text file information is look up with following query results. In real no mismatach.

select rtrim(ltrim(cast(cid as varchar))) as courseid,ltrim(rtrim(cast(weight as varchar))) as weight from table1

Any chance the query acting differently in server machine?

I couldnt any other possiblity. After the lookup it will send email.

Please give suggestion ASAP.

Thanks