"everything set up" is a bit vague.
if you are saying that you have a digium (or sangoma ...) card installed and have demonstrated that it is properly configured by dialing out through asterisk and achieved "sound in both directions" ... but now you need to convince Vicidial to dial through this card instead of your sip carrier ... then you have a diaplan alteration to make. If you look in extensions.conf, you will find samples of the necessary dialplans. I advise that you copy them from there and place them in a "Carrier" in Admin->Carriers instead of hard-coding them into the extensions.conf file, though. Makes life simpler in the future for making changes. It is not necessary to put anything in the "account entry" or "registration string" fields and as a result it makes no difference whether you choose SIP or IAX for the carrier type (since there will be nothing placed in sip.conf or iax2.conf because there is nothing in account entry or registration string).
If I have guessed wrong ... then perhaps the Newbie suggestions will help:
when you post, please post your entire configuration including (but not limited to) your installation method and vicidial version with build.
this IS a requirement for posting along with reading the stickies (at the top of each forum) and the manager's manual (available on EFLO.net, both free and paid versions)
You should also post: Asterisk version, telephony hardware (model number is helpful here), cluster information if you have one, and whether any other software is installed in the box. If your installation method is "from scratch" you must post your operating system and should also post the .iso version from which you installed your original operating system. If your installation is "Hosted" list the site name of the host.
If this is a "Cloud" or "Virtual" server, please note the technology involved along with the version of that techology (ie: VMware Server Version 2.0.2). If it is not, merely stating the Motherboard model # and CPU would be helpful.
Similar to This:
Vicibox X.X from .iso | Vicidial X.X.X-XXX Build XXXXXX-XXXX | Asterisk X.X.X | Single Server | No Digium/Sangoma Hardware | No Extra Software After Installation | Intel DG35EC | Core2Quad Q6600
Oh: And Welcome to the Party!