Unable to load data

Gurus,

I have created the InfoPack to load the data from R/3 into BW. However, I am not able to load any data from any InfoPackage.

The extractors work fine in RSA3, feel like is connection is having the problem but tested the following, all work fine:

In RSA1 ->Source System, I right-click on the R/3 Source System ->Customizing Extractors, and I will be able to logon to the R/3

source system successfully.

In RSA1 ->Source System, I right-click on the R/3 Source System ->Connection Param, and I tested the RFC connection

between R/3 and BW. The connection is working fine.

In RSA1 ->Source System, I right-click on the R/3 Source System ->Check, and no error is reported.

What else could be the problem.?

Please advice.