Do you use IE?
If you use Internet Explorer, it may be detecting a problem with the JeppView website or its certificate. This may disconnect the session with the website if IE beleives it has unsafe content. If this might be the case, try the follwoing:
Open IE, goto Tools <top right corner>
Click Internet Options
Click the Security Tab
Click Trusted Sites (Green tick)
Click the Sites button
Add the JeppView URL using the http:// prefix
Close and OK your way out
Reload IE and try again.
If this doe not work, try lowering the security level.
That would be my first go at it, I am an IT professional but I do not know much about your configuration to provide you with exact answers, PM me if this does not help and I'll see what I can do.