Re-direct to Toluna (Panel Company) for Qualified isn't working due to equation

Hello
Can anyone help me with the Qualified Complete re-direct link to Toluna (panel company) at the end of the survey?
They have an equation in their redirect (called Toluna ENC formula) and everything I'm doing is creating an error at the back-end for them.
I see the qualified complete in Qualtrics data, but they do not receive the qualified complete.

Their redirect for Qualified is:
http://ups.surveyrouter.com/trafficui/mscui/SOQualified.aspx?sname=XXXXX&TolunaEnc=[tolunaformula]&gid=[XXXX]   
where Toluna ENC is a formula as [(GID +3) mod 4001] x 17
I've removed the extra spaces in the equation as that was creating a series of %20.

I have correctly piped in for sname ${e://Field/sname} and for gid ${e://Field/gid}
My Terminates and Overquota links DO work so my sname fields and gid fields are ok

So for the Qualified redirect I have this:
http://ups.surveyrouter.com/trafficui/mscui/SOQualified.aspx?sname=${e://Field/sname}&TolunaEnc=[(${e://Field/gid}+3)mod 4001]x17&gid=${e://Field/gid}

They are telling me this error is occurring only because of the Toluna ENC formula not updating accurately at my end.
So for example, with gid of 10004, they should receive a formula of 34085 and this link:
http://ups.surveyrouter.com/trafficui/mscui/SOQualified.aspx?sname=q-LfKUmWUGkapA7pgTgsP6lIVzc&TolunaEnc=34085&gid=10004

But instead they receive the link still with the equation:
ups.surveyrouter.com/trafficui/mscui/SOQualified.aspx?sname=q-LfKUmWUGkapA7pgTgsP6lIVzc&TolunaEnc=[(10005+3)mod4001]x17&gid=10005