i always disconnect if i turn on tycoon ,why?
Maybe ask the author of the addon.
Maybe because that addon is so out of date it is laughable!
Try Tradeskillmaster or another addon that has been update and which you do not have to pay for the use of.
I’m assuming you paid for that addon, right? Because legally, you can’t use it unless you paid for it, and I’m pretty sure actively supporting copyright violation is against the spirit of the forum CoC, at a minimum.
If you paid for it, the vendors ought to support it. If you didn’t, don’t expect any support at all.