SSL Form in WordPress giving warning in FF

My client has a donation form at We enable the HTTPS using the plugin WordPress HTTPS. The donation form is via HTML code, and goes to another page to be processed before being sent back to the thank you page.
When the SUBMIT button is pressed, the user gets this error in firefox:

Although this page is encrypted the information you have entered is to be sent over an unencrypted connection and could easily be read by a third party.
Are you sure you want to continue sending this information.

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I don't know why they get it and how to correct (or work around) this error.

Please help.
Lev SeltzerAsked:
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Jason C. LevineDon't talk to me.Commented:
The form tag in your page is:

<form onsubmit="return ValidateDonationForm();" action="" method="POST" name="DonationForm">

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The http:// means it's submitting insecure.  The WordPress HTTPS plugin can't always correct these things, especially if they are generated by hand or from another plugin.  

Simply change the http: to https: in the form and it will stop the warnings.

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Edwin HofferTechnical ExpertCommented:
Hello Lev Seltzer,

Update all URLs from "" to "" and the problem will be solved.

The error shows because your website is connected with http URL too, just change the http to https and you will the green URL.

Hope that helped you

Best Regards
Lev SeltzerAuthor Commented:
Thank you. I just adjusted the <form> destination on the donation page and it works. Thank you.
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