Hi,

         When i run this below code for 1 mb attachment file it runs perfectly, but when i try to increase my attachment size to 2 to 5 mb i got an file not found error  and redirected to some page.Can any plz help me? 

public with sharing class AttachmentUploadController { 

public string attchname {get; set;} 

public blob attchfile {get; set;} 

public integer attchsize {get; set;} 

public string attchdescription {get; set;} 

public boolean getIsSaved() {return isSaved;}

public void upload()

{     

Attachment attch = new Attachment();     

if(attchName == null || attchfile == null || attchName == '' )

{         

attch.addError('Select a file to upload.');       

}

else {         

if (attchfile.size() > 1048576) {             

system.debug('The attached filesize is: ' +attchsize );             

system.debug('The attachmentsize is ' +attchfile.size() );             

string CaseId = ApexPages.currentPage().getParameters().get('cId');             

attch.ParentId = CaseId;             

attch.Name = attchName;             

attch.Body = attchfile;             

attch.Description = attchdescription;             

insert attch;             

isSaved = true;             

attch.body = null;             

attchfile = null;                       

} else

{             

system.debug('The attached filesize is: ' +attchsize );             

system.debug('The attachmentsize is ' +attchfile.size() );             

attch.addError('File size should be less than 5 MB');                        

}     

}

Thanks in advance.....