i have installed adobe acrobat XI pro, now when i want to run it, i give in the serial number, but they keep saying " we are unable to validate this serial number for Acrobat XI Pro. please contact customer support."

[ez-]

how can i run the adobe acrobat?

[pwillener]

Contact Adobe Customer Care - click on the Still need help? button to chat or talk with an agent (phone support is only available Mon-Fri during US daytime).