You got a URL or can you post whats on those lines???
db is D-ata-B-ase like MySQL
and text file uses files like *.txt
If your going to reintall it or use the textfile version try using the install guide I wrote you can find it in my sig. If you follow that you shouldn't get any errors.
Auron
Visit my site @ www.ragnaru.com
Adv. Poll Install Guide NOW BACK ONLINE! (And also rather out of date I would of thought)