i am using cart 5.5, having shipping problem, any time the weight is over 12 oz it won't calculate cost, that include when multiple products are added.i use USPS, i get the following error DomesticRatesV3;clsRateV3.CreateSinglePostage-CreateSinglePostage;R
i am using cart 5.5, having shipping problem, any time the weight is over 12 oz it won't calculate cost, that include when multiple products are added.i use USPS, i get the following error DomesticRatesV3;clsRateV3.CreateSinglePostage-CreateSinglePostage;RateEngineV3.ProcessRequest - Service not available.