Can I use tabu search for minimization problem ?

Hi all,
	I want to use tabu search to solve my minimization problem. but  
tabu search in R is for maximization, so I turn my function from f  
to -f? but the eUtilityKeep always be 0 from the second position. I  
have go through a part of source code found that it always give the  
default value to compare,

move <- ifelse(maxTaboo > maxNontaboo & maxTaboo > aspiration,
                         ifelse(length(which(neighboursEUtility ==  
maxTaboo)) == 1,
                                which(neighboursEUtility ==  
maxTaboo), sample(which(neighboursEUtility == maxTaboo), 1)),
                         ifelse(length(which(neighboursEUtility ==  
maxNontaboo & tabuList == 0)) == 1,
                                which(neighboursEUtility ==  
maxNontaboo & tabuList == 0), sample(which(neighboursEUtility ==  
maxNontaboo & tabuList == 0), 1)))

this cause the 0 value.

How can I use it to get my minimization value using tabu search in R ?

Thanks .