file enumeration

[gymka]

there is files:
file1.avi
file2.avi
file3.avi
file5.avi
file6.avi

if i start file1.avi, smplayer will add and file2.avi and file3.avi, but won't add file5.avi and file6.avi. why? looks like your file search algorithm is not logical... if i don't have file4.avi this not means that all other files is not from same series.