Custom report not recognizing Filter

I have a FAZ 3000D with 5.0.9 and I'm trying to create a report which can give Source IP, Website and bandwidth accumulated during a mentioned time which i will put in the Configuration tab.

I created the following dataset adding 2 Variables (test.JPG as screenshot)

select user_src, hostname, sum(bandwidth) as bandwidth

from

((select coalesce(nullifna(`user`), ipstr(`srcip`)) as user_src, hostname, sum(coalesce(sentbyte, 0)+coalesce(rcvdbyte, 0)) as bandwidth

from $log-webfilter

group by user_src, hostname

having sum(coalesce(sentbyte, 0)+coalesce(rcvdbyte, 0))>0 order by bandwidth desc)) t

group by user_src, hostname order by bandwidth desc

Then i created a Chart as It is needed so i can add it to a Report by cloning another one. 

I have try added a Filter on the Advanced setting (i.e. source IP) but is not being recognized; the data i'm getting on the report is of all the IPs.

Please can you tell me how to get this to work?. Im not sure wether is an issue of the Chart or the Dataset.

Thanks a lot