Why can't access Self Service Licensing Center

Hi, all

I just buy a new modelsim license, but when I login the altera account, I click self service licensing center (https://sso.altera.com/pf/adapter2adapter.ping?spsessionauthnadapterid=otksiebel&idpadapterid=otkmyaltera&targetresource=https://mysupport.altera.com/alteralicensing/license/index.html&_ga=1.102814471.64182356.1390498701), but nothing happened, I have try different computer and different network for several day. is the altera website down? Anyone could tell me what happened?

regard

Bill