No data found in RSA3 for Customer Serive extractors

Hi Gurus,

I am facing an issue with below extractor.

1) 2LIS_18_I0ACTY

2) 2LIS_18_I0CAUSE

3) 2LIS_18_I0ITEM

When I check in the tables of the above extractors I can see Notification Numbers.

Tables are

QMEL: Notification Header

QMFE: Notification Item

QMMA: Notification Activity

QMUR: Notification Cause

And when I check the above same extractors in RSA3 I am getting "0 data records selected" .

So, please let me know whether I am missing something or need to do any manipulations.

Thanks in advance

Peter