Unable to checkout a license error

Hi,

I have installed Quartus 13.1 on my Windows 7 64 bit machine. While trying to perform functional simulation

in modelsim I encountered an error

unable to checkout a license. vsim is closing.

** fatal: invalid license environment. application closing.

unable to checkout a license. make sure your license file environment variables are set correctly and then run 'lmutil lmdiag' to diagnose the problem.

modelsim-altera uses the following environment variables to check the licenses (listed in the order of preference)

1. mgls_license_file

2. lm_license_file.

I looked around for a solution and found this link http://www.altera.com/support/kdb/solutions/rd06272006_61.html.

I downloaded the file specified for Windows 7 from here https://www.altera.com/download/licensing/daemons/dnl-lic_daemons.jsp and

the contents of the extracted folder at some exe files like lmtools,lmutils etc. I could not find a .dat file anywhere. I also

tried the option "web license update" but it says not able to connect to internet.

Can anybody help me regarding this issue?

Thanks