cant get Soundforge to activate with serial number
Did you use the same email address you used when you initially registered Sound Forge, The activation serial and email address are paired. Your log-in info for the Magix forums may be different than your Magix Service Center log-in. If you cannot remember or find the pertinent info, contact Magix customer service.
btw @Fred-Tijstermanwelcome to the Magix Sound Forge users community! Next time, Read the 'Sticky' at the head for the main Sound Forge forum page and start a NEW TOPIC. You may also want to use a translation utility if English if you are not fluent with English.