turbo problems

[ILUVJDM]

yesturday i got my car on the road after changing my hubs and brakes on my s14 sr20....while leaving my town my car was running great, but after getting on the highway the turbo wouldnt boost what soever. i feel the motor is running fine when the turbo isnt boosting just feels like a ka with an exhaust. im quessing when the turbo gets hot it doesnt want to boost but i may be wrong cuz im not well educated with sr20 motors.. i would love some nico advise cuz u guys are the best when it comes to sr20 so please helpp