My usual recommendations: 1) Restart or Reset the iPad, if not already done (directions below); 2) Power Recycle your modem & router, i.e. turn off each (or pull the plugs), wait a while, and sequentially re-power the modem first & then the router; 3) Forget the Network - go into Settings -> Wi-Fi, then open the dialog box for the active network and forget; re-establish a connection; and 4) Reset Network Settings - go into Settings -> General; pick 'Reset' @ the bottom and select 'Reset Network....'. Let us know if any of these suggestions helps - if not, please post back - good luck!
When an app (or several) are misbehaving, I usually go through the following steps:
1. Force Close - open the multi-tasking bar (double tap the 'home buttom' or use multi-gesturing and swipe up); press & hold an app until all begin to 'jiggle'; find the offending app(s) and press the 'red circle w/ minus sign' - return to the home screen & try again.
2. Restart - press & hold the 'Sleep/Awake' (a.k.a. power) button until a red slider appears (may take a few seconds) - move the slider to turn off the iPad; then press & hold the same button until the Apple logo appears - wait for a restart.
3. Reset - press & hold the 'Power' and 'Home' buttons simultaneously until the Apple logo appears - this may take a longer time, so have patience; the iPad will 're-boot' - NOTE that none of these maneuvers will alter your apps, files, or settings.