INSERT permission was denied on the object 'employee_info', database 'payroll' schema dbo

You'll need to do this (presumably) in SQL-Server (SSMS).

Right-click the table in SQL-Server and give INSERT permissions to the user.

(...)

• Right Click the table
• Properties
• Permissions
• (if necessary) add the user or role
• click on the user/role
• permission insert, put a check-mark in the 'grant' box.

BTW -- you can do this via TSQL directly, but if you're having this problem now (you mention that you're new), then maybe start with the GUI, per above first.

Also -- this assumes you have access to do this in SSMS. If you're not the DBA / DBO, then you might need to contact somebody... :-)

Right Click on the Application Pool concerned. Click Advanced Settings Indentify Identity, Select LocalSystem

That should do the job.

If Answer provided previously works, then it means everytime the password changes, which must change in a normal Enterprise, you will need to update these connection strings as well, and you dont want to do that.