I just open an online Ecommerce store. For some days now i notice is too slow. A programmer i hire has done the CSS compressor and so. But the problems multiples. i tried changing theme, it will log me out automatically and request i enter my password again, i will do that, it will stop again and still ask for my password, it continue like that again and again.
I 'm not sure what to tell you…contact the seller and ask him for his opinion why that is…maybe he /she has answers for you ;0)