wifi issue

I have a curve 8530 with a data plan through verizon and I am able use the wifi in my home and other places that

have a pre shared key but at my job where you have a guest login screen I cannot connect. when I turn on the

wifi it has the white line in the tick box and the wifi symbol is present but not lit up. Aso ran wifi diognastics and I'm getting a red x in the connected box , I have my browser set to hotspot as well. Again this only seems to happen at

hot spots that have a login screen before you can connect any ideas?