ADE L simulation problem

Dear sir,

i have a problem in ADE L tool, when i launch the ADE L tool it show the following warning messages in the CIW window,

*warning*(iclic-3) could not get license Analog_Design_Environment_L

 *warning* feature  Analog_Design_Environment_L: Licensing OK.

warning (ADE-5051)  : unable to create simulation session.

*warning* A check out of the Artist Simulation Environment feature failed.

suggestion:[1] check out your license .

[2] Ask acurrnt user of the feature to exit the  Artist Simulation Environment.

please help me, 

Advance Thanks...

M.Muthukumar.