Ops. It wasn't Jeff. It was Marist89. I confused him/her with Jeff Hunter for some reason.
Anyway..One thing I missed. Try typing your command without separating commas.
Example:
SQLLDR CONTROL=C:\codes\bcp\oracle\load.ctl LOG=bar.log BAD=baz.bad DATA=C:\codes\bcp\oracle\data.csv userid=system/manager@RESEARCH
Sometimes you need to specify sqlloader version, i.e. 73, 80, 8i, etc.
Example:
SQLLDR73 CONTROL=C:\codes\bcp\oracle\load.ctl LOG=bar.log BAD=baz.bad DATA=C:\codes\bcp\oracle\data.csv,
userid=system/manager@RESEARCH

This shoul work.
If it doesn't post your error message here. We'll figure it out.