Access is denied

Problem goes like this!!!
I am using a dll in windows application for some purpose it works fine, but when i use the same dll in my web service it throws an exception saying that "access is denied"........
I am quite new to this error can anybody help me out with this issue............ plz
:-)

Please visit out site URL

ÀÐÅÍÄÀ ÊÎÒÒÅÄÆÅÉ ÏÐÎÄÀÆÀ ÊÎÒÒÅÄÆÅÉ ñòðîèòåëüñòâî êîòòåäæåé êàçàíü äèçàéí êâàðòèð êîòòåäæåé êîòòåäæ âûõîäíîãî äíÿ êîòòåäæ ðåêà êîòòåäæ ïðîäàæà òþìåíü ïðîåêòû êîòòåäæåé ãàðàæåé êîòòåäæè äîìà êàçàíü òèïîâûå ïðîåêòû äîìîâ êîòòåäæåé îñâåùåíèå êîòòåäæåé ðàñ÷åò ñòîèìîñòè ñòðîèòåëüñòâà êîòòåäæà êîòòåäæ ñàóíà êîòòåäæè ñàðàòîâà êîòòåäæè ñîñíîâî êîòòåäæ áàâàðèÿ êîòòåäæ òåðåìîê îöèëèíäðîâàííûå êîòòåäæè ïðîåêòû æèëûõ êîòòåäæåé ôóíäàìåíò ïîä êîòòåäæ ñíÿòü êîòòåäæ ñäàì êîòòåäæ ëåòó÷àÿ ìûøü