Invisable barrier problem

[Evildropbear]

Hi guys

I'm trying to recreate a stadium using the a prebuilt interier resource I found on this site, except the stadium appears to have invisable barriers that I can't figure out how to remove.

<object posX="-1398.460938" posY="995.640625" posZ="1024.460938" rotX="0" rotY="0" rotZ="0" model="13612" id="object20" /> 

- nobarrier

<object posX="-1292.367188" posY="1030.59375" posZ="1035.601563" rotX="0" rotY="0" rotZ="0" model="13611" id="object19" /> 

-also no barrier

<object posX="-1398.460938" posY="995.640625" posZ="1024.460938" rotX="0" rotY="0" rotZ="0" model="13612" id="object20" />   
  <object posX="-1292.367188" posY="1030.59375" posZ="1035.601563" rotX="0" rotY="0" rotZ="0" model="13611" id="object19" /> 

Put the two together and an invisable barrier appears, you can drive around just like in the stadium although the pieces arn't there.

Anyone know how to remove this annoyance?