My 200 is in a stand alone location and collects data. If I need the data to merge into the main file I boot VWS on my netbook, then plug the 200 into it and it downloads. If you are using VWS the data will not show on graphs etc. until you reboot VWS.
If you look in the Data directory you'll find dbase.csv, that's the main database and where the data should be. If you open it, be aware that if it's open during an update cycle it won't record that cycle, so make a copy and open that. The first column is the date and time and you will need to highlite and format that column as a "number" with 0 decimal places.
Once you have that, the number will be in the format of year, month, day, (24) hour and minute i.e., my last update a few minutes ago was 201108170845. Look down to the bottom for the latest update. In my case I found that I have to boot VWS first, then plug in the 200 to get it to download.
Also, you can tell if the 200 is actually collecting data by looking at the number of days of memory available. Press the TIME icon 4 times and it will tell how many days are left depending on how often you have it set. Wait a day and it should be one less.
I should add that we have power outages, so the PC goes down, but of course the 200 keeps logging, I found when I then booted the PC and VWS the 200 wouldn't download automatically, that's when I went to the boot first, then plug in the 200 to get it to work.