Outbound Or Inbound

I can choose: inbound OR outbound.
I am using the Danish provider Everlove, but I am experiencing the same with the Dutch provider Budget Phone, with or without trunks to the Danish provider enabled.

The problem is:
I have TWO accounts (or actually three, but one is not in use) and the same provider.
For each account, I created two trunks in FreePBX 2.5.1.2. So I am dealing with four trunks: two inbounds and two outbounds.
I made two inbound routes, pointing the incoming calls on my home number to an IVR and pointing the incoming calls on my business number to another IVR.
My Asterisk Box is receiving calls on both lines without any problem, AS LONG AS I write host=dynamic in my OUTBOUND trunks! When I remove host=dynamic, I cannot receive calls on both INBOUND trunks, one of them continuously is failing.
So it looks like, I NEED host=dynamic in my OUTBOUND trunks. But with host=dynamic, I cannot place any OUTBOUND call. I always get: "All circuits are busy now, please try again later". As soon as I remove "host=dynamic", I can place calls. So I can choose: Inbound OR outbound. What can I do?

When making an outbound call with the dynamic-line added to the PEER Details, I get "Unable to create channel of type 'SIP' (cause 20 - Unknown)" in the log.
Is Asterisk trying to connect to a host called "dynamic" in stead of "sip.everlove.dk"?