joomla chronoform saving data

I have a problem with chronoform. I created my form and everything. but when people input data, sometimes it doesn't get saved, sometimes the data look strange (encrypted?), but when it's me trying the form, it always works!

here an example of the strange data:

REGISTRATION DATE 2011-02-24 - 08:24:14

NAME xjvcZiqVZOf

SURNAME mbYCUldaGCfE

CHARGE CDOWWXMGA

CARD FdaYQzKjvJRjDdHiN

PHONE fUCjEIKBOQgBdtRUcdS

EMAIL qwrelb@gzblvr.com

HOW DID YOU GET TO KNOW THE LABMOND? w2yCfW iuykmqzzrasu,[url=http://stxpmgksgwqu.com/]stxpmgksgwqu[/url], [link=http://qdchzokvtmyk.com/]qdchzok开发者_如何转开发vtmyk[/link], http://fxbqxghstmyn.com/

LABMOND LEVEL 2° Livello

LOCAL OFFICE Campobasso

Any idea?

Turn on the built in captch or ReCaptcha, I bet these submissions are bots.