Xfinitywifi not working

so i always use the xfinitywifi in my house. last week when i clicked the wifi, the web browser popped up and i bought a pass. but after my pass expired, now the web browser wont pop up when i click on xfinitywifi to buy a new one. i already purchased my new pass but ever since last night the web brower wont pop up when i click xfinitywifi. im not sure what to do.