I cannot run Poolinfo

```
1: kd> !load poolinfo
failed to find module for symbol: nt!_POOL_DESCRIPTOR
failed to resolve nt!_POOL_DESCRIPTOR
Failed to resolve the required structures. Are symbols loaded?
poolinfo!DebugExtensionInitialize failed with 0x80004002
```

I get this error every time I try to install it, what should I do at this point?
