Playing Dreamcast Games ?

hi i have trouble playing Dream Cast Games.
i use chankast and Deamon tools or UltraISO.
to mount it and Chankast should read it, but it always take me to the bios screen and when i press select it tell me "Inset a CD game" or something like that.but from a long time, i used to Play Resident Evil Code veronica Normally with the same ways.
but now it doesn't.anybody have a solution ?
thank in advance

I could never get chankast to work. You should try getting nulldc. Way less glitches.

note: the games are downloaded from this site, does it because it not what they are calling selfboot ??
Post Merge: [time]1265829776[/time]
note: the games are downloaded from this site, does it because it not what they are calling selfboot ??

i used chancast to play dreamcast game it they run good enougth for mebe sure of the next things1. if you are mounting the cd image put the directory of the virtual drive not the one you have(i mean for example. normaly you use E:/ drive for reading disc. be sure to put the drive that marks daemon tools when you mount it maybe for you its F:/2. be sure of having well configured plugins3. do you already download: dc_bios and dc_flashi hope it was useful for you. the truth is I'm very bad to better explain what is my point
sorry (you know. English is not my native language)

1,2,3 are all right.
tried these before many times, but no good.
i still believe the DC games from this site are not Selfboot, like what im read, i heared the non-selfboot games won't run in emulators, and there are programs to do that but all links are dead.. :(
thank you anyway

the vast majority of our roms are self boot.

really ? so there is another problem, i will keep to find out what it is.
by the way do have selfboot application just in case ?
sorry for inconvenience

i use the isos from here to play so i dont think that is your problem

super_pastafari32 would u tell what emulator you use and virtual drive softwar ??, and exactly your configuration.
i'm gonna try your settings

is said that a picture is worth a thousand wordshttp://s804.photobucket.com/albums/yy321/super_pastafari32/?action=view&current=Dibujo.jpgDRIVE: F:/ (you say you have the correct drive so i think there is no problem there.)
VIDEO: 640 x 480 (NO show wire frames, NO use zwrite, NO use alpha test zwrite, NO wireframe, YES show status (however this don't afect you))
CABLE TYPE: NTSC (the great part of the games are NTSC so this shoul do it. but there are some games PAL, you should try PAL maybe work in some games. however as i said the grat majority of the games are NTSC)
PRIORITY: normal
(NOTE: Chankast not work very well in vista or seven. plus make sure your CPU meets the minimum requirements (i soupose you already know that because you said you have played it before, but I say it just in case))well that my configuration i hope it works on your CPU