multiple regression analysis

Hi There,

I am conducting multiple regression analyses using SPSS. I have an outcome variable and several potential predictors, one of which is employment status (employed or unemployed). When I try to run that in SPSS the employment status variable causes an error:

For models with dependent variable Give financial donations, the following variables are constants or have missing correlations: newempstatus. They will be deleted from the analysis.

Looking at the frequencies - 94% are employed while 6% are unemployed - could this be the reason for the above warning message. One of my co-investigators says the homogeneity shouldn't make any difference.

Kind regards,