Contact Form 7(Version 4.2.2) File Upload issues

I cannot get my contact form to attach files correctly. The message will send and I can receive it, but I cannot open the attached files. Instead of having an option to open attachments it gives me

“–b1_feaa3f3c4ab344d6355ac96387e97f95
Content-Type: image/jpeg; name=”small-logo.jpg”
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=small-logo.jpg”

and this is followed by a bunch of text. I am a rookie to wordpress and have very little understanding of code. I have read other posts and i believe i have the form setup correctly though.

<p>Your Name (required)<br />
    [text* your-name] </p>

<p>Your Email (required)<br />
    [email* your-email] </p>

<p>Phone Number<br />
    [text your-phone] </p>

<p>Subject<br />
    [text your-subject] </p>

[file FileUpload limit:5mb filetypes:gif|png|jpg|jpeg|pdf|dwg|zip|xlsx id:FileUpload class:5mb class:max class:size]

<p>Your Message<br />
    [textarea your-message] </p>

[quiz Question "5+5=|10"]</p>

[submit class:bluebutton id:form-submit "Send Mail"]

I also have [fileupload] in the the file attachment part of the mail tab.

please let me know what I am doing wrong