Exclusion of selected file name in Sender File adapter

Dear Experts,

I am working in a File -> SAP-PI -> ECC.I am able to get the files

and move it to ECC but the adapter is picking the files which I do not want..

In the source folder, i have files with name PG.xml and GY.xml. Both the files are added everyday with

time stamp. My requirement is to pick the PG.xml file and exclude the GY.xml files.

So in the sender File, i entered the following.

File Name= *.xml

In the Advance Selection for Source file,in the Exclusion mask= G*

But still the file with name GY.xml is being picked up.

Is there any wrong in the entries made ?

Avoiding duplicity of the already processed files, I checked Enable Duplicate handling in Processing tab

Thanx

Rebecca Alice