I've run into similar problems on newer titles with PowerDVD. I tend to use an old version of PowerDVD (like ver 8 or 10), and some new titles just won't load on it (I suspect it's Java or BD-Live related). All of these discs are trying to either ping a server for Java menu updates, or dynamic trailers of some kind (playing a trailer off a server). I would think TMT5 would be new enough to not be a problem, but I guess you never know... Have you tried it on TMT6 just to see if it works there?
Each of these functions is called by a Title Jump, the discs usually does something like this:
[run a bunch of HDMV code]
Title jump to Java title 1
(this calls the studios server asking for menu code updates)
[run a bunch of HDMV code]
Title jump to Java title 2
(this calls a server trying to download a new trailer or 4)
[run a bunch of HDMV code]
Title jump to Java title 3
This is the actual menu title (or sometimes an anti-piracy title and then a menu title).
Using BDEdit, I'll hack the initial commands of the disc to jump straight to that third title, bypassing all HDMV code and all the Java titles that access the internet (not something that's easy to explain as the commands can be ridiculously convoluted depending on how the disc was built... But the SlySoft programmers probably understand what I'm saying.), and after doing that the discs always work on PowerDVD 8 (i.e., and old outdated version), and they load up a hell of a lot faster... This seems to affect Universal and Fox discs for sure, and Paramount too I think. Newer Java code (especially the online stuff) just doesn't seem to work well on outdated players. Universal is at least easy to see when you have it right- You should get one filmstrip loading icon, and then the main menu comes up (give-or-take a logo or two). Normally you get a filmstrip (the loading icon), black screen, maybe a filmstrip again and little box with a 'looking for updates', then streaming trailers if it finds them, then a filmstrip again, and the logos/main menu. (Since I bypass _ALL_ the HDMV code, the disc will only load up in English... If you need/want foreign language menus, you'd have to leave some of the HDMV code in place that checks the language settings...)
It's an odd problem I've only noticed because I keep trying to use older software players (because they work so much more efficiently than the overloaded crap they release now... 8) but they have issues with the Java code sometimes...)
It'd be neat if AnyDVD could somehow figure out a way to bypass all this automatically, but it would probably be hard to create a universal solution that would work for all discs since the programming can be so different from title to title (and definitely from studio to studio)...
Isn't Ctrl-T on the keyboard just doing a Top Menu command? I've heard that hitting Top Menu or Pop Up a couple of times on these discs can get them working (which is sort of manually forcing it through the sequence I mentioned above)...