i have paypal on my site... it is properly working

but i migrate to other host server...

then suddenly i cant checkout to paypal succesfully...

i noticed ... that on the url bar on my working paypal (mypaypal b4 on my oald server)

is https://www.sandbox.payp...f944cbac24b2728ea935a7c

but now its like this...

https://www.sandbox.payp...mp;business=kamalintest@yahoo.com&custom%20=5&item_name_1=Sacred%20Heart%20#100&amount_1=5000&quantity_1=1&item_number_1=22&currency_code=PHP


i guess its on php setting on my new server... but i wonder which it is >.< please need help urgent