Very very very slow...

osTicket Version- v1.9.4
Server Software- Microsoft-IIS/7.5
PHP Version -5.4.9
MySQL Version -    5.6.16
Database Space Used - 303.36 MiB
Database Space for Attachments -0.00 MiB

i have using "Attachments on the filesystem" for attachments

my application is very slow, really disappointed,  it takes upto 60 to 500 seconds per each and every click, my server have good configurations, my clients also very disappointed, my manager said to change any other open source tool for help desk system.

i dont know the reason of this worst performance..



Thanks & regards,
Mk