Without some sample data, this is just a guess but it seems likely that you may need to specify the separator between the 2 columns of data.
Probably the easiest way to check this is to open the file in a text editor and see if the fire is using an unusual separater.
As examples of different separators
Comma
dat1 <- read.csv("mydata.csv", sep = ",")
Tab
dat1 <- read.csv("mydata.csv", sep = "\t")
Semi-colon
dat1 <- read.csv("mydata.csv", sep = ";")