"C:\INETPUB\WWWROOT\SLEPCHA\APP_DATA\ASPNETDB.MDF" because the database is read-only.

i have created a appl and deployed it in IIS .

When i login from the login page i get a error :Server Error in '/slepcha' Application.
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Failed to update database "C:\INETPUB\WWWROOT\SLEPCHA\APP_DATA\ASPNETDB.MDF" because the database is read-only.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Failed to update database "C:\INETPUB\WWWROOT\SLEPCHA\APP_DATA\ASPNETDB.MDF" because the database is read-only.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

Have you checked to see whether that file has the ReadOnly attribute set?