Possible reasons and solutions:
Ensure the cable is a rs-232 and not a rs232c.
Look at the following rs232 adapter, it is high quality made, which is included in the package.
2: To set COM port as COM1.
—> under CONFIGURATION>I/O MANAGEMENT>TECH2>PROPERTIES.
Note: Please do not use usb—rs232 (converter), it is useless.
Look at USB security dongle:
For GM Opel tis2000: use D630 computer, you can insert the USB dongle to use or use the patch to crack.
For Saab TIS2000: usually use IBM T30, for other computer you may get error message, need to insert the USB dongle, can’t use the patch to crack.
How to crack TIS2000 for GM / Opel:
Attach some images below: