When I build my ios app with distribution profile, I can get email from xdk with download link but when I click the download link ( Click here to install your app OTA on iOS 4+ devies) install screen does not showing. I've tried with two different devices and result same.
Everything was working till this morning.
Try building again. Also try removing an existing install of the app on the device. Also, on the most recent email will work, so you can not use an email from a prior build to attempt a install.
The other suggestions that John provided also apply. We are working on fixing that 30 minute timeout, it is supposed to be good for 30 days.
The problem has been fixed, OTA installs will now work (with the restriction that the link is only good for 30 minutes from the moment the build begins -- that's a different bug that is still being worked on and will likely not be fixed until our June release).