Bukkit

What version of DynamicEconomy are you using?:
most recent version

Try to explain how to arrive at the problem:
1) I tried to change the prices/delete items out of items.yml and it crashed the plugin and the server when updating the prices.
2)
3)

Please paste the error log, if any. (Also provide DynamicEconomy log)
+ [2012-07-25 20:09:02.491] Could not connect to MySQL database
+ [2012-07-25 20:10:11.318] Could not connect to MySQL database
+ [2012-07-25 20:10:16.962] dingousa logged in.
+ [2012-07-25 20:10:21.823] deepfreeze132 logged in.
+ [2012-07-25 20:10:22.138] dingousa called /price for item MELONSEED
+ [2012-07-25 20:10:27.462] Lolcat2121 logged in.
+ [2012-07-25 20:12:40.291] Could not connect to MySQL database
+ [2012-07-25 20:12:47.349] Lolcat2121 logged in.
+ [2012-07-25 20:15:01.355] Could not connect to MySQL database
+ [2012-07-25 20:15:18.335] dingousa logged in.
(The mySQL settings are all fine though)

Please add a screenshot or video, this is also very helpful.
See photo and file attached.