Transferring Text Messages from Cell Phone to Laptop PC?

I have the LG Env3 through Verizon wireless and just found out they have NO program to do this. I do not have a data plan and do not think I need one to do this? I downloaded Bit Pim and thought it was going to work and plugged my cell phone into my laptop via the "charger cord" USB cable - plugged into the phone as in charging and then into a USB port on my laptop. I run Windows 7 on the laptop. I chose Detect Phone and had to manually enter the phone and then clicked Detect Phone and it says no phone detected and no com/serial port. I dont' know where to go from here. I did the Edit/Settings/Select Com Port and all it says is AUTO and says it will detect it automatically. I thought perhaps the port was no good (brand new laptop) and tried two other ports and still same thing. I have some text messages I need to be sure are saved and am afraid my phone will get full or I will accidentally erase them. Can anyone advise? I also tried GODSWMOBILESMS TRANSFER and that didn't work at all. I need some help and soon. Thank you!