problem "where not" statement sql

[#1]

I'm writing a very simple query, which unexpectedly is giving me headache:

concatenate (Temp) load * from '$(ArchiveFile)' (qvd)

where not (YearQtr = '$(LoadQtr)' and Scenario = '$(LoadScenario)')

I expected NOT to see only those records, which satisfy both conditions of there where statement. But as a result I see nothing at all. Tried trimming the variables, but to no avail.

To narrow down the problem, the following two "where" statements give me different results. Why?

1) where not (YearQtr = '$(LoadQtr)')

2) where YearQtr <> '$(LoadQtr)'

Thank you!

[#2]

I tried the same splitted where conditions with sample data ,it worked perfectly for me. Probably can you recheck your data again. But the splitted where conditions is correct.

Pls post the sample data if the issue is not resolved.