CFLocation not forwarding appropriately

[cluksha]

I am having the darndest time with this one.

We have a tracking application. The link looks somehting like this ...com/ads/ad.cfm?IAID=2354

The ad.cfm page says this

INSERT INTO tbl_Hits(CompanyID, UserID, Instance, RSMWWW, IssueAdvID, ItemTypeID)
VALUES(#CID#, #SID#, #NOW()#, 1, #IAID#, #ITID#)

<cflocation url="http://#web_add#" addtoken="No">

Now the link works great - if you already have a browser window open in the background. (Sorry - the tracking link is being sent via email.) If you click on the link in your email WITHOUT having a browser window open, it sends you to the client's site but with the wrong url so you get a 404 page.
This happens in both major browsers.

FOr example, email this link to yourself or paste it into a browser window (THE ONLY WINDOW OPEN) and you will get an error...

http://www.deskeng.com/dbpages/d_rdberegcheck.cfm?RT=aswl&IAID=3999
If you paste and resend it will be ok. Or If you paste it (click from email) with a browser window open - IT WILL WORK.

What I just noticed is that whenever it is not working, what is happening is that the link now includes something like this every time... ;JSESSIONID=80302323951069093655468

PLEASE HELP, email me if you have any other questions.

THANKS!