I never had any problems accessing 405th on my phone... and the new forum works a lot better and faster.
And I never used that app Tapatalk or what was it called, it isn't available for Windowsphones.
I check 405th on normal web browser on my WinPhone.
Old forum was bit slower for me and especially the new forum is fast, isn't missing anything.
What issues do you have?
The old forum did have an app - Tapatalk. The new forum no longer requires a separate app to run properly on mobile devices. Please tell us a little more about what you're trying to do and what device you're using, Noodle109.