In our project we have 2 types of trend. 1-Online trending 2-Archive trending

Archive trending
If we click on a specific date, no trend display will appear.

Online trending
There are 2 scenario.
1st scenario ~ When clicking trend button, only X and Y axis display. No graph appear.
2nd scenario ~ When clicking trend button, the trending display not appear.Seems like no link to the picture.

For your information...
1-Project is using zenOn 6.21 Sp1 B0
2-Project is running on Touch Screen
3-The project has been running at site for 2 years. The problem on trending only happen recently.

I do not no what to do instead of checking the size of archive ....then...what's next?