Did they recently add antes or make any other changes specific to that stake of Zoom tables?
Make sure you always start HM3 first before you open the PokerStars Client. If you closed PokerStars for any reason and did not close HM2 please close them both and start HM3 before you start PokerStars again.
On the first run, after an install or an update, you must start the Hold'em Manager 3 HUD BEFORE you launch PokerStars. If PokerStars is open, you must close PokerStars, start the HM3 HUD/Import and then open PokerStars before Zoom HUD will function properly.
*If the Zoom HUD is not displaying after doing the above, please uninstall PokerStars, rename the associated C:\Users\UserName\AppData\Local\PokerStars.xx folders. and re-download and install PokerStars as the PokerStars installation is more than likely corrupted and a PokerStars reinstall should resolve the issue.
If you continue to have problems please tell us which ps.xx skin you play on and what the client/server version numbers are and send the logs/files as instructed below:
Please see our HUD Troubleshooting FAQ and reproduce the issue then send the requested logs, screenshots, and hand history files in a support ticket as instructed at the bottom of that FAQ with a link to this forum thread.