bash - concatenation of two lines using awk -

i have file each row having 74 columns. have been trying combine these lines if first , second column matches. file looks below.

check_in|2000000000|ms|xxxx|xxxx|n|34|n|n|n|n|n|y|n|n|n|n|n|123456|aaaaaa|122333|||||||||||aaaaaa|bbbbbbb|ccccccc|||||||||||||||||||1000123|aaaa|n|qwerty||registered|registered|registered|unregistered|19-05-2015|video|edm||||||||||xxxxx check_in|2000000000|ms|xxxx|xxxx|n|34|n|y|n|n|n|n|n|n|n|n|n|345676|abcgdwejj|aaaaaaa||||||||||||||||||||||||nnnnnnn||||||||1000001|cccccc|n|qyuirt||registered|registered|registered|unregistered|19-05-2015|video|edm||||||||||xxxxx 

i have used below script:

cat sample_file4.txt | awk -f "|" '{line=""; for(i = 3; <= nf ;i++) line = line $i"|"; table[$1"|"$2]=table[$1"|"$2]"|"line;} end { (key in table) print key "==>" table[key];}' > output9.txt 

the record not appended first line.except key values, same line being repeated.like below

1.check_in|2000000000==>|ms|xxxx|xxxx|n|34|n|n|n|n|n|y|n|n|n|n|n|123456|aaaaaa|122333|||||||||||aaaaaa|bbbbbbb|ccccccc|||||||||||||||||||1000123|aaaa|n|qwerty||registered|registered|registered|unregistered|19-05-2015|video|edm||||||||||xxxxx 2.||ms|xxxx|xxxx|n|34|n|y|n|n|n|n|n|n|n|n|n|345676|abcgdwejj|aaaaaaa||||||||||||||||||||||||nnnnnnn||||||||1000001|cccccc|n|qyuirt||registered|registered|registered|unregistered|19-05-2015|video|edm||||||||||xxxxx 

please me them onto single line.

i write this:

awk '     begin {fs = ofs = "|"}     { key = $1 subsep $2 }     !(key in lines) {lines[key]=$0; next}     {$1=$2=""; line=$0; sub(/^../, "", line); lines[key] = lines[key] fs line}     end {for (key in lines) {print lines[key]}} ' file