Problem With PHP Scripts Without MySQL i have problems with scripts

I've been working on my site, and the first time i tried my hand witha php guestbook script, i did good, it worked on my host. but although i successfully installed an "send email" php script, but somehow although on the site when i tired out the form, though it says email has been sent, i've not received any email at all!!!

and i've checked the account that was to specified for the email to be sent , i have entered everything right.

This are the steps the manual asked me to do,

1) Open up config.php with a word editor such as notepad. Fill in all the colours, etc thats if you want to change the colours! Then SAVE
2) Upload everything onto your server, I would make a new folder called form or something to keep all the files in it neat.

3) You need to use the code below to add the form to your page. The background will be transparent but only with IE and mozilla.

and in the readme.txt was the following html code given (that was to be inserted in any desired page).

"<iframe src="form.php" width="176" height="220" name="inline" scrolling="no" border="0" frameborder="0" marginwidth="0" marginheight="0" allowtransparency="true"></iframe>"

now i dont understand as to why i am not receiveing the mails i sent from the form....

Please help

Is this all the code you have? It looks like all you have is an Iframe in html, where is the php that processes the form, and where is the form itself? Apparently from the Iframe I noticed a reference to a form.php, you need tolet us see that also. It would be impossible to guess what your form and process after it do without seeing what you have.