Javascript error in admin extension settings page

[ktsixit]

Hi,
I'm getting the following javascript errros in magento administration System > Configuration > CheckItOut! Extension.
Here are the errors

prototype.js:5557 Uncaught TypeError: Cannot read property 'get' of undefined
    at _createResponder (prototype.js:5557)
    at Function.observe (prototype.js:5636)
    at (index):1296
_createResponder @ prototype.js:5557

prototype.js:5557 Uncaught TypeError: Cannot read property 'get' of undefined
    at _createResponder (prototype.js:5557)
    at Function.observe (prototype.js:5636)
    at (index):1306
_createResponder @ prototype.js:5557

prototype.js:5557 Uncaught TypeError: Cannot read property 'get' of undefined
    at _createResponder (prototype.js:5557)
    at Function.observe (prototype.js:5636)
    at (index):1316

The lines 1296,1306,1316 have the following code:

(1296) Event.observe($('carriers_tablerate_condition_name'), 'change', checkConditionName.bind(this));
(1306) Event.observe($('carriers_tablerate_condition_name'), 'change', checkConditionName.bind(this));
(1316) Event.observe($('carriers_tablerate_condition_name'), 'change', checkConditionName.bind(this));

This is content from the Default Values Configuration section.

[evoratec]

In Default Values Configuration you must select the Default Region/State .
The errors come from geoip module.