i have this mid,but now it does't work

when I use apt-get update,the error log:

正在读取软件包列表... 有错误!
E: Dynamic MMap ran out of room
E: 处理 canola2 (NewVersion1)时出错
E: Problem with MergeList /var/lib/apt/lists/repository.maemo.org_extras_dists_chinook_free_bin ary-armel_Packages
E: 无法解析或打开软件包的列表或是状态文件。