May be a problem with the sending email... Are you sure you can send email via MODx ? (add-on QuickEmail is available to test mail functions)
You don't say anything nor give details it's a bit difficult to point what's going wrong...
Tell us a bit more about your configuration, post part of your code (Formit Call, other hooks or validators, light code of your form...) everything to help us to help you ...
Cheers
I'll try that, thank you.
You might also try SPForm if all you need is a simple contact form.
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PLEASE, PLEASE specify the version of MODX you are using.
MODX info for everyone:
http://bobsguides.com/modx.html