[R] please help me!

[mpalmier@mines.edu]

hello there, 
   I'm a new user to R and I am having difficulty reading a file into the 
program.  Here's the error I keep getting, I bet there's a simple solution, 
but I cant find any...

Error in file(file, "r") : unable to open connection
In addition: Warning message: 
cannot open file `c:MikeWeather2.txt' 

I have made sure that my working directory is the same as the place where the 
file is.  I have also tried using the full path name of the file.  read.table, 
read.delim, read.csv, and scan have all been attempted with no result.  What 
causes this message, and how can I fix it.  Thanks in advance for your help,

Mike