Unable to print from Yahoo mail

I installed Comodo 5.5 on my Mom’s laptop. She is now having trouble printing email from yahoo email. (Before install, there was no problem.)

The Yahoo error message said this was “most likely due to a pop-up blocker”. No other software installed since before problem. I’ve already went thru the hassle of configuring the Firewall to permit printing to her wireless printer from other apps.

I tried having her change Defense+ to training mode, exiting IE, re-opening IE and retrying with no success. I did the same thing with Firewall, again with no success.

Anyone know how to attack this problem?

Is the browser that is being used sandboxed? That would be one explanation?

If sandboxing is not the problem can you post a screenshot of the D+ logs (View Defense + Events)?