You need to make sure you are properly logged in (log out then log back in if needed). Clicking on Subscribe on the right (under My Forum) should take you to a simple brickboard page with a list of forum email notification settings, try scrolling down if you don't see the settings. If it still keeps taking you to the Paypal link then a) try another browser or another device and try changing the subscription settings from there, or b) clear your browser cookies, deleting every cookie with brickboard in it is all you should need, but you may only have an option to clear all your browser cookies. If that still doesn't work then either something about your software setup is very different from the rest of us or your profile is somehow corrupt and you will need to contact the admin.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now