hI i had an asynchronous class contains two methods.so i used to @future calls for those. i am posting my trigger code and asynchronous class.could you please help me.

Thanks in Advance

trigger code

trigger open120 on Opportunity (before insert, after update) 
{

 if(trigger.isinsert){
list<String> OpportunityAccountIds = new list<String>(); 
for(opportunity opp:trigger.new)
{OpportunityAccountIds.add(opp.Accountid);}
opp120.opp120Method(OpportunityAccountIds);}

else{
list<String> OpportunityAccountIds = new list<String>(); 
list<String> OpportunityOldAccountIds = new list<String>(); 
for(opportunity opp:trigger.new)
{OpportunityAccountIds.add(opp.Accountid);}
for(opportunity opp:trigger.old)
{OpportunityOldAccountIds.add(opp.Accountid);}

opp120.opp120Method(OpportunityAccountIds);  //getting error too many future calls:11 at this line
opp120.opp120OldMethod(OpportunityOldAccountIds);}


}

asynchronous class

public class opp120{
@future(callout=true) 
public static void opp120Method(list<String> OpportunityAccountIds){ 
list<Opportunity>lstOpp =[select Id, StageName,Expiry_Date__c from Opportunity where AccountId IN :OpportunityAccountIds];  

for(Account ac:[select id,No_of_Open_Deals_in_Next_120_Days__c from Account where id in :OpportunityAccountIds])
{
integer i=0;
 for(Integer j = 0; j < lstOpp.size(); j++)  {
if((lstopp[j].StageName=='Prospecting'||lstopp[j].StageName=='Renewal'||lstopp[j].StageName=='Submission')&&(lstopp[j].Expiry_Date__c>=System.today()+120))
{
i++;
}
ac.No_of_Open_Deals_in_Next_120_Days__c=i;
}update ac;
}
}
@future(callout=true)
public static void opp120OldMethod(list<String> OpportunityOldAccountIds){ 
list<Opportunity>lstOpp = [select Id, StageName,Expiry_Date__c from Opportunity where AccountId IN :OpportunityOldAccountIds];  

for(Account ac:[select id,No_of_Open_Deals_in_Next_120_Days__c from Account where id in :OpportunityOldAccountIds])
{
integer i=0;
 for(Integer j = 0; j < lstOpp.size(); j++)  {
if((lstopp[j].StageName=='Prospecting'||lstopp[j].StageName=='Renewal'||lstopp[j].StageName=='Submission'||lstopp[j].StageName=='ClosedLost'||lstopp[j].StageName=='ClosedWon')&&(lstopp[j].Expiry_Date__c>=System.today()+120))
{
i++;
}
ac.No_of_Open_Deals_in_Next_120_Days__c=i;

}update ac;
}
}

}