after a few search on google, i found it out that it was nothing wrong with my application but to my IIS settings on printing document limitation.
It was written that by default IIS set printing job max to 75. and the solution that is recommended is to reset IIS compare to change value on computer registry.
After i reset my IIS, it works again normally.
this reference is to change computer registry
https://www.codeproject.com/Questions/545595/Theplusmaximumplusreportplusprocessingplusjobsplus
Thank You
