Caching issue with Captcha 0.4.6

[newrecruit02]

We are getting many request saying that captcha will not process, "please try again etc". I have tested it locally and can never duplicate the problem. However this is starting to become an issue for our customers. Any advice on this and how to or what to look for with captcha and caching?

CMS Version 1.10.3


Installed Modules
CMSMailer 2.0.2
CMSPrinting 1.0
FileManager 1.2.0
MenuManager 1.7.7
MicroTiny 1.1.1
ModuleManager 1.5.3
News 2.12.3
Search 1.5.4
ThemeManager 1.1.4
FormBuilder 0.7.3
Captcha 0.4.6
jQuery 1.2.0
CGExtensions 1.31
ExtendedTools 1.3.3
Analytics 1.2.2
Blogs 0.3.3.1
AComments 1.1.1
FrontEndUsers 1.18.1

[Dr.CSS]

Set the page as not cached in Options tab..?