Invalid Coupon code error does not show to customer

[grillandpatio]

When a customer puts in an invalid coupon code they are redirected back to Step 2 of 3 during checkout. The alert message "Invalid Coupon Code" does not display for the customer. I have multiple sites using zen cart and it works on those sites. I have even done a file comparison on the includes folder between the sites and the order total and coupon files are the same. I checked the PHP settings and they were the same as well. I displayed all the defined variables and noticed certain items were not passed back to the array.

Array from the working site

Array
(
[messageStack] => messageStack Object
(
[messages] => Array
(
[0] => Array
(
[params] => class="messageStackCaution larger"
[class] => redemptions
[text] => Warning Invalid Coupon Code
)

)

)

[module_list] => Array
(
[0] => ot_subtotal.php
[1] => ot_coupon.php
[2] => ot_group_pricing.php
[3] => ot_tax.php
[4] => ot_shipping.php
[5] => ot_loworderfee.php
[6] => ot_gv.php
[7] => ot_total.php
)

[value] => ot_coupon.php
[lang_file] => includes/languages/english/modules/order_total/ot_coupon.php
[module_file] => includes/modules/order_total/ot_coupon.php
[class] => ot_subtotal
)

Array from the site that is not working

Array
(
[messageStack] => messageStack Object
(
[messages] => Array
(
)

)

[module_list] => Array
(
[0] => ot_subtotal.php
[1] => ot_coupon.php
[2] => ot_group_pricing.php
[3] => ot_tax.php
[4] => ot_shipping.php
[5] => ot_loworderfee.php
[6] => ot_gv.php
[7] => ot_total.php
)

[value] => ot_coupon.php
[lang_file] => includes/languages/english/modules/order_total/ot_coupon.php
[module_file] => includes/modules/order_total/ot_coupon.php
[class] => ot_subtotal
)

I am new to zen cart and php so any help would be greatly appreciated. I am even wondering if this is a godaddy server issue.

[lat9]

Do you have any checkout-related plugins installed on the store where the message is not displayed?

[grillandpatio]

I do not believe so. I came on after this has been in production. The main things that I have done is move servers on Go Daddy, they were on a server without cpanel, and upgrade from 1.5.1 to 1.5.3

[grillandpatio]

Problem solved! Need to upgrade php version to 5.4. Currently 5.3.