When you connect a monitor to a PC they specifically say to connect it to the PC and turn it on before you power up the PC - did you do that - if not do it that way and see if it fixes your problem - the software from the LG site should work.
Go to the below site your Windows 7 Drivers and manuals are there : LG Product Support for W2061TQ-PF
Not sure about the specific software - just try it if your in doubt and setup a restore point firstly. http://www.lge.com/products/sidemenu...q%7Clist.jhtml
To install a driver OR program in compatibility mode - right click the setup.exe file - click properties - click compatibility - check run in compatibility with vista
/xp etc - check run as administrator - leave the rest blank. Start setup.exe and install - This gets it to install if its written for another OS.
To run a program in compatibility mode right click the shortcut to the program and do as above then start the program.
There is a new version there also v3.08 :
Note: 'forteManager 3.xx' is not compatible with 'forteManager 2.xx'. If you have used forteManager versions lower than 2.80, you need to update with the latest forteManager 2.80.