PayPal gateway has rejected request. Security header is not valid (#10002: Security error)

[kckee]

Hi Paypal Community,

I got this error in my Magento website  :  PayPal gateway has rejected request. Security header is not valid (#10002: Security error)

How to solve this problem ? i have re-entered the API Username , Password and Signature, is still the same error .

I have my first website using this Paypal account, is there a problem using the same Paypal account with more than one website ?

Thanks

From

Kee

[DPCreations]

What are you really trying to do?  Details would be helpful.

[kckee]

Hi DPCreations,

I test my new website ( Magento ), once i click the Paypal CheckOut, this message  : PayPal gateway has rejected request. Security header is not valid (#10002: Security error)  at my Shopping Cart.

I search around most of the answers is re-entered all the API Username , Password and Signature, and clear the cache as well,

and the result still the same.

For the second question , this is my second website using the same Paypal account, will it be the reason ? Should i create another Paypal account to test it out OR this is not the reason cause this error ( #10002:Security error )

Thanks in advance

From

Kee

[Whac-A-Mole]

there is a technical forum,better to inquire there